我在处理公众号服务器配置，调用获取access_token接口。生成的代码不是合符规范的代码，{"access_token":"42_cj6wDOJyNaP_F2ykdJpSwbynOfJs1V6kyn0KUIXtATR4w-6pPjqfL7cdrk5kk5YjK9a88xUnnADP6VRV-6_7AI_pfl2ekoRzYqmfrMz9MzrdssgThb7Q0WoSndx_yvlQ_R_-aMwY-g16-Ug5MOYiAEAWYI","expires_in":7200}，这是怎么回事呀